Been reading a lot of Romance books lately. They are like a cozy blanket. For a to be considered Romance, are required to have a "happily ever after" eg no sudden character death. It ensures the author isn't going to mess your day up.
It depends on what kind of fiction you like, as romance is a kind of meta genre that spans every other genre. Knowing nothing about you, other than the fact you are on HN, I would recommend The Rosie Project. It is a contemporary comedy romance, one of the only works of fiction Bill Gates has ever put on his yearly recommendation list.
Overall, your best bet is finding a community and lurking. Maybe asking for recommendations.
Reddit has a number of communities. /r/RomanceBooks is the main one, but there is also /r/fantasyromance, /r/HistoricalRomance/, /r/ScienceFictionRomance/, etc... If you are a guy and kinda feeling out of place, there is also /r/Romance_for_men
Also, a lot of them have sex, which is nice.